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ADS7871IDBR Datasheet(PDF) 5 Page - Texas Instruments |
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ADS7871IDBR Datasheet(HTML) 5 Page - Texas Instruments |
5 / 46 page ADS7871 SLAS370C − APRIL 2002 − REVISED OCTOBER 2004 www.ti.com 5 ELECTRICAL CHARACTERISTICS For Internal Functions (1), −40 °C ≤ TA ≤ 85°C, VDD = 5 V, BUFIN = 2.5 V (using external reference), 2.5-MHz CCLK and 2.5-MHz SCLK (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Multiplexer On resistance 100 Ω Off resistance 1 G Ω Off channel leakage On channel = 5.2 V, Off channel = 0 V VLNx = 5.2 V 100 pA Off channel leakage current On channel = 0 V, Off channel = 5.2 V 100 pA On channel leakage On channel = 5.2 V, Off channel = 0 V 100 pA On channel leakage current On channel = 0 V, Off channel = 5.2 V 100 pA PGA Amplifier Offset voltage 100 µV Small signal bandwidth 5/Gain MHz Settling time G = 1 0.3 µs Settling time G = 20 6.4 µs Analog-To-Digital Converter DC Characteristics Resolution 14 Bits Integral linearity error ±2 LSB Differential linearity error ±0.5 LSB No missing codes 14 Bits Offset error REFIN = 2.5 V ±2 LSB Full-scale (gain) error ±0.02 % Common mode rejection, RTI of A/D 60 dB Power supply rejection, RTI of ADS7871 External reference, VDD = 5 V ±10% 60 dB PGA Plus A/D Converter Sampling Dynamics fCCLK = 2.5 MHz, DF = 1 Throughput rate 50 CCLK cycles 50 kHz Conversion time 14 CCLK cycles 5.6 µs Acquisition time 28 CCLK cycles 9.6 µs Auto zero time 8 CCLK cycles 3.2 µs Aperture delay 36 CCLK cycles 12.8 µs Small signal bandwidth 5 MHz Step response 1 Complete Conversion Cycle (1) The specifications for the total system are overall analog input to digital output specifications. The specifications for internal functions indicate the performance of the individual functions in the ADS7871. |
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